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E90/E91/E92/E93 (2006 - 2013) The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

I did get a TPMS alert about 3 weeks ago when the temperature first drop around the 40's . I filled the front and back tires in their respective pressure . Yesterday and today the temperature drop around 20-30's so I got the snow crystal by it self , so I'm guessing I should be ok with the tire pressure for now . Thanks for replying and sharing your knowledge, Much appreciated.

That is very cool. I remember when I lived in Seattle and the temps dropped to 30 degrees without snow. All of the main highways ended up being closed because of multiple accidents due to black ice and rear end accidents. Lots of bridges and cold wind. I am from So Cal and had no idea how quickly that can happen. How cool that pir car will warn us!

Just received that warning last week in my new (to me) '09 335i. Freaked me out at first. My old VW Passat had a similar warning - but it also had warnings come on quite a bit for things that were always breaking - the reason I just got rid of it

The snowflake has totally desensitized me to the warning chime in the car. I bought my BMW in winter and it was cold enough that the snowflake alert would chime when I first turned it on. I easily ignored this since it just spammed during the seatbelt warning. (It doesn't even wait for the seatbelt chimes to finish, it sloppily interrupts instead.) Then as it got a little warmer, it would chime while I was driving and send my heart into my throat. I'm accustomed to cars that chime at me when driving only when something really bad is happening like a flat tire or engine problems. But no, in a BMW it means the outside temperature has just hit 37 degrees. This time of year it is constantly blinging at me.

It really throws off passengers too, like WTF is that? After I explain it to them, they appreciate the idea, but they don't have to live with it every day for half of the year...

The snowflake has totally desensitized me to the warning chime in the car. I bought my BMW in winter and it was cold enough that the snowflake alert would chime when I first turned it on. I easily ignored this since it just spammed during the seatbelt warning. (It doesn't even wait for the seatbelt chimes to finish, it sloppily interrupts instead.) Then as it got a little warmer, it would chime while I was driving and send my heart into my throat. I'm accustomed to cars that chime at me when driving only when something really bad is happening like a flat tire or engine problems. But no, in a BMW it means the outside temperature has just hit 37 degrees. This time of year it is constantly blinging at me.

It really throws off passengers too, like WTF is that? After I explain it to them, they appreciate the idea, but they don't have to live with it every day for half of the year...

Do you recall the CNBC documentary on BMW and the segment about the sound engineer who 'designs' all the chimes? I maintain that he failed at his job. If you have ever had the seatbelt gong/ low fuel gong/ and snowflake gong happen simultaneously, it is apparent that these should have been designed as a harmonic arpeggio. It would have much more impact and be so much more understandable why the car is emulating the noises made by a Las Vegas slot machine hitting the jackpot.

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